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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2019-2020 Linaro Limited
- */
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <reset-uclass.h>
- #include <scmi_agent.h>
- #include <scmi_protocols.h>
- #include <asm/types.h>
- static int scmi_reset_set_level(struct reset_ctl *rst, bool assert_not_deassert)
- {
- struct scmi_rd_reset_in in = {
- .domain_id = rst->id,
- .flags = assert_not_deassert ? SCMI_RD_RESET_FLAG_ASSERT : 0,
- .reset_state = 0,
- };
- struct scmi_rd_reset_out out;
- struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_RESET_DOMAIN,
- SCMI_RESET_DOMAIN_RESET,
- in, out);
- int ret;
- ret = devm_scmi_process_msg(rst->dev->parent, &msg);
- if (ret)
- return ret;
- return scmi_to_linux_errno(out.status);
- }
- static int scmi_reset_assert(struct reset_ctl *rst)
- {
- return scmi_reset_set_level(rst, true);
- }
- static int scmi_reset_deassert(struct reset_ctl *rst)
- {
- return scmi_reset_set_level(rst, false);
- }
- static int scmi_reset_request(struct reset_ctl *rst)
- {
- struct scmi_rd_attr_in in = {
- .domain_id = rst->id,
- };
- struct scmi_rd_attr_out out;
- struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_RESET_DOMAIN,
- SCMI_RESET_DOMAIN_ATTRIBUTES,
- in, out);
- int ret;
- /*
- * We don't really care about the attribute, just check
- * the reset domain exists.
- */
- ret = devm_scmi_process_msg(rst->dev->parent, &msg);
- if (ret)
- return ret;
- return scmi_to_linux_errno(out.status);
- }
- static int scmi_reset_rfree(struct reset_ctl *rst)
- {
- return 0;
- }
- static const struct reset_ops scmi_reset_domain_ops = {
- .request = scmi_reset_request,
- .rfree = scmi_reset_rfree,
- .rst_assert = scmi_reset_assert,
- .rst_deassert = scmi_reset_deassert,
- };
- U_BOOT_DRIVER(scmi_reset_domain) = {
- .name = "scmi_reset_domain",
- .id = UCLASS_RESET,
- .ops = &scmi_reset_domain_ops,
- };
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